Britney Spears takes the stage to present an award at the 2006 American Music Awards in Los Angeles, in a Tuesday, Nov. 21, 2006 photo.[AP]

Britney Spears wants her fans to know that their prayers have helped her during a difficult time.

"I am so blessed that you care enough about me to be concerned and will continue to live in this brighter state with all of you by my side during this trying time," she wrote in the letter posted Wednesday on her Web site.

Her publicist did not immediately return an e-mail seeking comment.

The pop princess recently performed what were believed to be her first public concerts in nearly three years. Her musical comeback comes amid a tumultuous time in which she divorced aspiring rapper Kevin Federline, had a series of run-ins with the paparazzi and checked into rehab.